Warnes may refer to:
- People
- Christopher Warnes, academic
- Geoffrey Warnes, (1914-1944) RAF Squadron Leader
- Fred Warnes, (b.1915) an English professional footballer
- Ignacio Warnes, (1772-1816) an Argentine soldier
- Jennifer Warnes, (b.1947) an American singer
- Manuel Antonio Warnes, (1727–1802) Spanish soldier
- Mary Jane Warnes, (1877-1959, aka Mary Jane Fairbrother) Australian women's activist
- Reuben Charles Warnes, (1875-1961) boxing middleweight champion who participated in the 1908 Olympics
- Thomas Walter Warnes, (b.1938), English gastroenterologist
- Locations
- Miscellaneous
- Deportivo Warnes, a Bolivian football team
- Sport Boys Warnes, a Bolivian football team